Global Patent Index - EP 0105921 A4

EP 0105921 A4 19851121 - PROCESS FOR CULTURING A MICROALGA, AND EXTRACTING A POLYSACCHARIDE THEREFROM.

Title (en)

PROCESS FOR CULTURING A MICROALGA, AND EXTRACTING A POLYSACCHARIDE THEREFROM.

Title (de)

ZUCHTVERFAHREN FÜR MIKROALGEN UND EXTRAKTION EINES POLYSACCHARIDES HIERAUS.

Title (fr)

PROCEDE DE CULTURE D'UNE MICRO-ALGUE ET EXTRACTION D'UN POLYSACCHARIDE DE CELLE-CI.

Publication

EP 0105921 A4 19851121 (EN)

Application

EP 83901757 A 19830411

Priority

US 37186882 A 19820426

Abstract (en)

[origin: US4417415A] Porphyridium cruentum is cultured in an enriched seawater medium using a high initial cell concentration until the productivity of polysaccharide production by the alga is maximized. The whole culture is then extracted by making the culture strongly alkaline, and heat treating it. The culture is cooled, acidified and the polysaccharide precipitated by addition of a water-miscible organic solvent such as ethanol. Very high yields of polysaccharide are obtained, in excess of 4.5 grams per liter of culture.

IPC 1-7

A01G 7/00

IPC 8 full level

A01G 33/02 (2006.01); C12N 1/12 (2006.01); C12P 19/04 (2006.01); C12R 1/89 (2006.01)

CPC (source: EP US)

C12N 1/12 (2013.01 - EP US); C12P 19/04 (2013.01 - EP US)

Citation (search report)

  • [Y] FR 1458061 A 19660304 - INST FRANCAIS DU PETROLE
  • [Y] US 3476741 A 19691104 - JONAS JOHN J
  • [A] US 4202969 A 19800513 - FUJII TAKAYOSHI [JP], et al
  • [A] US 3176003 A 19650330 - STANCIOFF DIMITRI J
  • [Y] COMPTES RENDUS SEANCES ACAD. SCIENCE, vol. 293, "série" III, 6th July 1981, pages 35-37, Paris, FR; C. GUDIN et al.: "Biochimie appliquée - Production de polysaccharides sulfatés par un biophotoréacteur à cellules immobilisées"
  • [A] CHEMICAL ABSTRACTS, vol. 77, 1972, page 252, abstract 2630u, Columbus, Ohio, US; J. RAMUS: "Production of extracellular polysaccharide by the unicellular red alga", & J. PHYCOL. 1972, 8(1), 97-111

Designated contracting state (EPC)

AT BE CH DE FR GB LI LU NL SE

DOCDB simple family (publication)

US 4417415 A 19831129; CA 1189010 A 19850618; EP 0105921 A1 19840425; EP 0105921 A4 19851121; JP S58201993 A 19831125; WO 8303738 A1 19831110

DOCDB simple family (application)

US 37186882 A 19820426; CA 425760 A 19830413; EP 83901757 A 19830411; JP 7369683 A 19830426; US 8300529 W 19830411